Furuno FEA-2807 - ARCS Chart Display; How to Display ARCS Chart Material; How to Select ARCS Chart Datum

9. Raster Chart Material
9-30
(WT)
9.14 ARCS Chart Display
9.14.1 How to display ARCS chart material
To display ARCS format raster chart material on the display, do the following:
1. Put the cursor just above the area where the ECDIS shows chart scale.
2. Spin the scrollwheel to show "Activate ARCS Chart" in the mouse functions area, then push the left mouse
button to show ARCS charts on the display.
9.14.2 How to select ARCS chart datum
Datum is used to select between different models of the earth. It is essential that you use datum in a consistent way.
If you use paper charts together with electronic charts, it is recommended that you use the same datum as your
current paper chart to avoid misalignment between your electronic system and points taken or plotted on your
current paper chart.
Once you have selected a datum, all numerical latitude and longitude position values are presented in your selected
datum.
Note: If you use ARCS raster chart material, the rasterized charts contain some rasterized position information.
These positions, like scales in the edges of ARCS charts, are true only if you have selected native datum of that
ARCS chart. Normally this is the natural situation, because you use ARCS together with corresponding official
paper chart and because you have selected the datum that is equal to the official paper chart.
To find out native datum of ARCS chart, do the following:
1. Click the sidebar area in the information area, spin the scrollwheel to show Menu/ /Select Sidebar in the mouse
functions area, push the right mouse button, select Chart Legend from the menu then push the scrollwheel.
2. Click the Details… button in the ARCS chart window to show the ARCS Details window.
In the Hor Datum field the native datum of the displayed ARCS chart is shown.
3. Put the cursor on Datum on the upper right corner of the ECDIS and select desired
datum by spinning the scrollwheel and pushing it to confirm selection. Selected
datum is shown on the status bar (at the top of the screen).